Also this morning, that historic meeting with Vatican City between president Obama and the pope. Of course, you and I had the opportunity, the honor, a very humbling honor and there we are meeting pope Francis just a few months ago, a beautiful and really quite peaceful experience. It really was. It was his Wednesday audience shortly before Christmas. Well, this morning, president Obama is meeting pope Francis and ABC's Jonathan Karl is there. Vatican City with the president. Good morning, Jon. Reporter: Good morning, robin. This is president Obama's second visit to the Vatican. But his first meeting with pope Francis. They met nearly an hour one-on-one in the Vatican library before the president brought in the rest of the U.S. Delegation including secretary of state John Kerry, jay carney and Susan rice, the national security adviser. The president hoped to use this meeting to get to know pope Francis, somebody who he has clearly been fascinated by as most of us in the United States are and he has expressed gratitude to the pope for his commitment to social justice and equality. Pope Francis never set foot in the United States before but I would not be surprised to see coming out of this a formal invitation from the president for pope Francis to visit the United States. We certainly do hope he takes that invitation and comes here to the U.S. John, president Obama's policies, many of them are not in line with the catholic church so what is the meeting like, the relationship like with the pope? Reporter: Well, clearly they don't see eye to eye on many social issues such as gay marriage and abortion, but there is a lot of common ground between this president and this pope, particularly on the issue of incoming equality and social justice. You know, the president gave a big speech on poverty late last year and he quoted the pope, the quote was "How can it be that it is not a news item when an elderly homeless person dies of exposure but it is news when the stock market loses two points?" So while the pope and the president don't see eye to eye on a lot of those social issues there is certainly common cause on the issue of equality and fighting poverty as a moral issue. And, again, we certainly hope that he does come here to the United States of America. Jon Karl with the president at Vatican City, thank you, Jon.

This transcript has been automatically generated and may not be 100% accurate.

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